Apps4.Pro Planner Migrator (Chrome Extension) helps users who want to move from Trello to Microsoft Planner easily.
All you need to do is to export JSON file for the board from Trello and import to Planner. Within minutes all Boards and cards in Trello are imported to
Planner as Plans and Tasks. That’s how Apps4.Pro made your life simple.

You can migrate following Board details from Trello to Microsoft Planner plans

Lists

Cards

Archived Cards

Board Members

You can migrate following Card details from Trello to Microsoft Planner tasks